{"id":"F2006B02780","name":"AD/B727/77 Amdt 1 - Hydraulic System B Pump Motor","slug":"ad-b727-77-amdt-1-hydraulic-system-b-pump-motor","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42122,"registerId":"commonwealth-F2006B02780-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/77 Amdt 1 - Hydraulic System B Pump Motor","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 727 Series Aeroplanes\n\n \n\nAD/B727/77\n\nAmdt 1\n\n\nHydraulic System “B” Pump Motor 11/87\n\n \n\nApplicability: All models equipped with ABEX P/N 57186 pump motor. Requirement: Action in accordance with FAA AD 87-02-05 R1 Amendment 39-5675.\n\nNote: Boeing Service Bulletins 727-29-47 Revision 2, and 727-29-55 refer.\n\n \n\nCompliance: In accordance with the requirement document.\n\n \n\nBackground: This amendment is raised to incorporate FAA AD 87-02-05 R1 which introduces terminating action, and supersedes FAA AD 76-22-08 Amendment 39-2762 as the requirement document for this AD.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The amendment replaces the earlier FAA AD (FAA AD 76-22-08 Amendment 39-2762) with FAA AD 87-02-05 R1 as the requirement document and notes that the FAA R1 introduces a terminating action. This alters the operative requirement document and the ongoing compliance obligations for affected aircraft (Background)."},"complexity_factors":["Dependence on an external regulatory document (FAA AD 87-02-05 R1) for the substantive requirements","Reference to manufacturer service bulletins (Boeing SB 727-29-47 Rev 2 and 727-29-55) without repeating their content","Technical subject-matter (hydraulic pump motor) requiring specialist maintenance and parts","Limited text in the AD itself — most obligations are delegated to referenced documents","Change in regulatory status by introducing a \"terminating action\" and superseding a prior FAA AD"],"plain_english_summary":"This AD mandates that Boeing 727s fitted with ABEX pump motor P/N 57186 comply with FAA AD 87-02-05 R1 (superseding an earlier FAA AD) and references Boeing Service Bulletins 727-29-47 Rev 2 and 727-29-55. It affects aircraft owners/operators and maintenance providers, imports the FAA’s “terminating action,” and requires actions and costs set out in those external documents — making compliance dependent on and limited to the referenced FAA/Boeing materials."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope — safety requirements for a specific hydraulic pump motor on Boeing 727 aircraft. The amendment merely updates the incorporated FAA directive to a newer revision that provides terminating action rather than recurring inspections. No expansion of affected aircraft, systems, or operational requirements."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 defined applicability criterion (ABEX P/N 57186)","Single cross-reference to external FAA directive (AD 87-02-05 R1)","No nested conditions or exceptions","No interpretation section or defined terms","Relies entirely on incorporated external document for technical requirements"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific maintenance actions on aircraft.\n\n**What it does:** It orders owners and operators of **Boeing 727 aircraft** fitted with a specific hydraulic pump motor (ABEX part number 57186) to follow safety instructions originally issued by the US Federal Aviation Administration (FAA AD 87-02-05 R1).\n\n**Why it matters:** The hydraulic system powers critical flight controls. This directive addresses potential failures in the \"System B\" pump motor. The amendment introduces a **\"terminating action\"** — meaning it provides a permanent fix that ends the need for repeated inspections, replacing an older directive (FAA AD 76-22-08) that likely required ongoing checks.\n\n**Who must comply:** Anyone operating Boeing 727s with the specified pump motor in Australia must complete the required maintenance actions according to the FAA's timeline and procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor","history":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor/history","analysis":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor/analysis","conflicts":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor/conflicts","importantCases":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor/important-cases","documents":"/api/acts/ad-b727-77-amdt-1-hydraulic-system-b-pump-motor/documents"}}